JP7235002B2 - Coil lifting method and lifter - Google Patents

Description

The present invention relates to a coil lifting method and a coil lifting lifter.

A thin steel sheet wound into a roll is called a coil (also called a "steel strip"). Some coils are continuously sheared to a predetermined width from one coil and slit into a plurality of strips. A plurality of slit coils that are slit into a plurality of strips are generally placed side by side in a coil storage place. When only the outer slit coil of the slit coils placed side by side is lifted by the lifter, the width of the slit coil is narrow, so that one of the two coil supporting arms on both sides in the width direction of the lifter is lifted. It may be lifted using only the coil support arm. The operation of the lifter is performed by a worker (who also serves as the crane operator) in the cab of the overhead crane on which the lifter is loaded.

At this time, since the gap between the adjacent slit coils is extremely narrow, it is extremely difficult for the operator to grasp the position of the coil supporting arm portion in the inner diameter of the slit coil. Therefore, when the tip of the coil-supporting arm portion reaches the inner diameter of the adjacent slit coil, when lifting the slit coil to be lifted, the tip of the arm portion comes into contact with the adjacent slit coil. However, there is a problem that the slit coils that do not fall over. On the other hand, if the tip of the coil-supporting arm portion is not sufficiently inserted into the inner diameter of the slit coil to be lifted, there is a risk that the lifted slit coil will drop.

In order to solve such a problem, Patent Document 1 discloses that when a lifter having a coil supporting arm portion is visually operated by an operator to lift the coil, the coil and the lifter are separated by using a laser beam. Alignment methods have been proposed. The method proposed in Patent Document 1 aligns the coil and the lifter by visually guiding a laser beam emitted from a laser beam generating means fixed at a predetermined position of the lifter to a predetermined position of the coil. This is the method.

However, the method proposed in Patent Document 1 is not effective as a method for adjusting the tip position of the coil supporting arm portion in the coil width direction. That is, it is not effective to ensure that the tip of the coil supporting arm portion is inserted into the inner diameter of the slit coil to be lifted and to prevent the tip of the coil supporting arm portion from contacting the adjacent slit coil.

JP 2010-111445 A

The present invention has been made in view of the above circumstances, and its object is to improve the worker's skill when a worker (who also serves as a crane operator) operates a lifter to lift a coil (especially a slit coil). A method for lifting a coil and a lifter for lifting the coil, in which the tip position of the arm for supporting the coil of the lifter can be inserted into the predetermined position of the inner diameter of the coil and the coil can be reliably lifted in a short time regardless of the above. to provide.

The gist of the present invention for solving the above problems is as follows.

[1] Using a lifter equipped with a laser head and a coil-supporting arm, an operator visually confirms the irradiation position of the laser beam emitted from the laser head, and adjusts the position of the coil-supporting arm with respect to the coil. and a coil lifting method for lifting the coil by inserting the coil supporting arm portion into the inner diameter of the coil,
The laser head irradiates the laser beam from directly above the tip of the coil-supporting arm toward the tip of the coil-supporting arm, and the optical axis of the laser beam emitted from the laser head is aligned with the coil. A method for lifting a coil, wherein the coil is positioned at the tip of the support arm.

[2] Using a lifter equipped with a laser rangefinder for measuring distance by irradiating a laser beam and a coil-supporting arm, the laser rangefinder measures the distance between the laser rangefinder and the coil surface, and is measured. A coil lifting method for adjusting the position of a coil supporting arm portion with respect to a coil based on the distance and inserting the coil supporting arm portion into the inner diameter of the coil to lift the coil,
The laser rangefinder irradiates the laser beam from directly above the tip of the coil-supporting arm toward the tip of the coil-supporting arm, and the optical axis of the laser beam emitted from the laser rangefinder is: A method for lifting a coil, wherein the coil is positioned at the tip of the arm for supporting the coil.

[3] The lifter has two coil-supporting arm portions, and one of the coil-supporting arm portions is inserted into the inner diameter of the coil to lift the coil, or The method for lifting the coil according to [2] above.

[4] a coil supporting arm;
a laser head that emits a laser beam;
A lifter for lifting a coil, comprising
The laser head irradiates the laser beam from directly above the tip of the coil-supporting arm toward the tip of the coil-supporting arm,
The installation position of the laser head is moved in synchronization with the movement of the coil support arm so that the optical axis of the laser beam emitted from the laser head is positioned at the tip of the coil support arm. A lifter characterized by comprising:

[5] a coil support arm;
a laser rangefinder that measures distance by irradiating a laser beam;
A lifter for lifting a coil, comprising
The laser rangefinder irradiates the laser beam from directly above the tip of the coil support arm toward the tip of the coil support arm,
The installation position of the laser rangefinder moves in synchronization with the movement of the coil support arm so that the optical axis of the laser beam emitted from the laser rangefinder is positioned at the tip of the coil support arm. A lifter configured to:

According to the coil lifting method according to the present invention described in [1] above, the lifter itself is provided with a laser head that generates a laser beam for indicating the tip position of the coil supporting arm, so that the operator can lift the coil By concentrating only on the laser beam irradiated upward, the position of the coil support arm portion relative to the coil can be adjusted, and the tip position of the coil support arm portion can be inserted into the predetermined position of the inner diameter of the coil. , the coil can be reliably lifted in a short time.

According to the coil lifting method according to the present invention described in [2] above, the lifter itself is equipped with a laser rangefinder for measuring the distance to the coil. Also, the position of the coil supporting arm can be adjusted with respect to the coil, and the coil can be reliably lifted in a short time by inserting the tip position of the coil supporting arm into a predetermined position of the inner diameter of the coil.

According to the lifter according to the present invention described in [4] above, since the lifter itself is provided with a laser head that indicates the tip position of the coil-supporting arm portion with a laser beam and generates this laser beam, the laser beam is emitted from the laser head. is projected onto the coil, the position of the coil supporting arm portion with respect to the coil becomes clear. As a result, the operator can insert the distal end position of the coil supporting arm portion into the predetermined position of the inner diameter of the coil, and can reliably lift the coil in a short period of time.

Further, according to the lifter according to the present invention described in [5] above, since the lifter itself is equipped with a laser rangefinder for measuring the distance to the coil, by irradiating the coil with a laser beam from this laser rangefinder, , the position of the coil support arm relative to the coil becomes clear. As a result, the operator can insert the distal end position of the coil supporting arm portion into the predetermined position of the inner diameter of the coil, and can reliably lift the coil in a short period of time.

It is a schematic diagram explaining a 1st embodiment of the present invention. FIG. 5 is a schematic diagram illustrating a second embodiment of the present invention;

The present invention will be specifically described below with reference to the accompanying drawings. FIG. 1 is a schematic diagram illustrating a first embodiment of the invention.

In FIG. 1, reference numeral 1 is a lifter, 2 is an arm support, 3 is a coil support arm, 4 is a mounting member, 5 is a laser head, 7 is a laser beam, 8 is a hanging ring, and 9 is a coil (slit coil). , 10 is the inner diameter of the coil. Here, the suspension ring 8 is a member for lifting the lifter 1 with an overhead crane or the like by inserting a hook of an overhead crane or the like into its inner hole. In addition, the inner diameter 10 of the coil 9 refers to the hollow portion at the center of the coil, and is hereinafter simply referred to as "the inner diameter 10 of the coil".

A lifter 1 is used to lift a coil 9 placed on a coil storage place. That is, a worker (also serving as a crane operator) in the cab of an overhead crane (not shown) running on the crane girter inserts the hook (not shown) of the overhead crane into the suspension ring 8 of the lifter 1. The lifter 1 is lifted by an overhead crane, moved vertically above the coil 9 to be lifted, and the coil 9 is lifted by inserting one of the coil supporting arms 3 into the inner diameter 10 of one of the coils. The vertical position adjustment of the lifter 1 with respect to the coil 9 and the position adjustment of the coil support arm portion 3 with respect to the coil inner diameter 10 are performed visually by an operator in the cab of the overhead crane.

As shown in FIG. 1, a lifter 1 according to the present invention comprises a pair of coil-supporting arms 3 and two laser heads 5 . The laser head 5 is installed on the mounting member 4 provided on each coil supporting arm portion 3 so that the laser head 5 is always positioned directly above the tip 3s of each coil supporting arm portion 3 in the vertical direction. ing. With this configuration, the installation position of the laser head 5 moves in synchronism with the movement of the coil support arm portion 3, and the optical axis of the laser beam 7 emitted from the laser head 5 is aligned with the coil support arm portion 3. It is positioned at the tip 3s. Here, the “tip 3s” of the coil-supporting arm portion 3 refers to a region within 30 mm, preferably within 5 mm, from the open end of the coil-supporting arm portion 3 .

One pinion gear (not shown) is installed on the arm support portion 2 , and a rack gear (not shown) that engages with this pinion gear is attached to the pair of coil support arm portions 3 . installed in each. When the pinion gear is rotated by the operation of an electric motor (not shown) installed on the arm support section 2, both the left and right coil support arm sections 3 move synchronously in opposite directions. .

Using the lifter 1 configured as described above, the coil lifting method according to the present invention is carried out as follows.

A worker in the operator's cab of the overhead crane places a lifter vertically above the coil 9 to be lifted, which is placed in the coil storage area, while the tip 3s of the coil support arm 3 is irradiated with the laser beam 7 from the laser head 5. Move 1. Next, the operator lowers the lifter 1 so that the tip 3s of the coil supporting arm portion 3 is at the same horizontal position as the coil inner diameter 10 of the coil 9 to be lifted, and the left and right coil supporting arm portions 3 into the inner diameter 10 of the coil.

The coil supporting arm portion 3 to be inserted into the coil inner diameter 10 is naturally determined according to the position of the coil 9 to be lifted among the plurality of coils placed side by side. In other words, the corresponding coil supporting arm portion 3 is inserted in the direction in which the coil that is an obstacle is not placed. When the coil supporting arm portion 3 is inserted into the coil inner diameter 10, the lifter 1 is moved by an overhead crane, so that even if the coil supporting arm portion 3 is inserted into the coil inner diameter 10, the lifter 1 is not moved. Instead, the pinion gear may be rotated to move the coil supporting arm portion 3 to insert the coil supporting arm portion 3 into the inner diameter of the coil 10, or the pinion gear may be moved while moving the lifter 1. The coil supporting arm portion 3 may be inserted into the coil inner diameter 10 by rotating.

After the coil supporting arm portion 3 is inserted into the coil inner diameter 10 of the coil 9 to be lifted, the operator visually confirms the irradiation position of the laser beam 7 irradiated on the surface of the coil 9, and the surface of the coil 9 is Using the position of the laser beam 7 as a guide for position adjustment of the tip 3s of the coil support arm 3, the position of the coil support arm 3 with respect to the coil inner diameter 10 is adjusted.

If the position of the tip 3s of the coil supporting arm portion 3 is adjusted to a predetermined position, that is, the tip 3s of the coil supporting arm portion 3 is positioned above the center of gravity (central position) of the coil 9 to be lifted in the width direction. When it is positioned at the back and adjusted to a position where it does not come into contact with the adjacent coil, the hoisting wire of the overhead crane is hoisted to hoist the lifter 1 vertically upward. By winding the lifter 1 upward, the coil 9 to be lifted is gripped by the coil supporting arm portion 3 and lifted. After that, the overhead crane is moved to a new coil storage place, and the coil 9 to be lifted is lowered to the new storage place.

As described above, in the present invention, the surface of the coil 9 is irradiated with the laser beam 7 which is always in a fixed positional relationship with respect to the coil supporting arm portion 3, so that the position of the tip 3s of the coil supporting arm portion 3 can be grasped. ing. Accordingly, the operator can easily grasp the tip position of the coil supporting arm portion 3 by confirming the position of the laser beam 7 on the surface of the coil 9 to be lifted.

Next, a second embodiment of the invention will be described. In the second embodiment, a laser rangefinder is installed in place of the laser head 5 in the first embodiment, and other configurations are the same as in the first embodiment.

2, reference numeral 1A is a lifter, 2 is an arm support portion, 3 is a coil support arm portion, 4 is a mounting member, 6 is a laser rangefinder, 7 is a laser beam, 8 is a suspension ring, 9 is a coil, and 10 is is the inner diameter of the coil.

A worker (also serving as a crane operator) in the operator's cab of an overhead crane (not shown) traveling on the crane girter inserts the hook (not shown) of the overhead crane into the suspension ring 8 of the lifter 1A and lifts the lifter. 1A is lifted by an overhead crane, moved vertically above the coil 9 to be lifted, one coil supporting arm part 3 is inserted into one coil inner diameter 10, and the coil 9 is lifted. The vertical position adjustment of the lifter 1A with respect to the coil 9 and the position adjustment of the coil support arm 3 with respect to the coil inner diameter 10 are performed visually by an operator in the cab of the overhead crane.

As shown in FIG. 2, the lifter 1A according to the present invention comprises a pair of coil-supporting arms 3 and two laser rangefinders 6. As shown in FIG. The laser rangefinders 6 are attached to the mounting members 4 provided on the respective coil supporting arm sections 3 so that the laser rangefinders 6 are always positioned directly above the tips 3s of the respective coil supporting arm sections 3 in the vertical direction. is set up. With this configuration, the installation position of the laser rangefinder 6 moves in synchronism with the movement of the coil support arm section 3, and the optical axis of the laser beam 7 emitted from the laser rangefinder 6 is aligned with the coil support arm section. It is positioned at the tip 3s of 3. Here, the “tip 3 s” of the coil supporting arm portion 3 refers to a region within 30 mm, preferably within 5 mm from the open end of the coil supporting arm portion 3 .

When the coil supporting arm portion 3 is not inserted into the coil inner diameter 10, the laser rangefinder 6 measures the distance between the laser rangefinder 6 and the tip 3s of the coil supporting arm portion 3, and the coil supporting arm When the part 3 is inserted into the coil inner diameter 10, the distance between the laser rangefinder 6 and the surface of the coil 9 is measured.

A single pinion gear (not shown) is installed on the arm support portion 2, and a rack gear (not shown) that engages with the pinion gear is attached to each of the pair of coil support arm portions 3. is set up. When the pinion gear is rotated by the operation of an electric motor (not shown) installed on the arm support section 2, both the left and right coil support arm sections 3 move synchronously in opposite directions. .

Using the lifter 1A configured as described above, the coil lifting method according to the present invention is carried out as follows.

A worker in the operator's cab of the overhead crane vertically illuminates the tip 3s of the coil support arm 3 with a laser beam 7 from a laser distance meter 6, and vertically above the coil 9 to be lifted, which is placed in the coil storage area. Move lifter 1A. Next, the operator lowers the lifter 1A so that the tips 3s of the coil supporting arm portions 3 are at positions equivalent to the horizontal position of the coil inner diameter 10 of the coil 9 to be lifted, and the left and right coil supporting arm portions 3 into the inner diameter 10 of the coil.

The coil supporting arm portion 3 to be inserted into the coil inner diameter 10 is naturally determined according to the position of the coil 9 to be lifted among the plurality of coils placed side by side. In other words, the corresponding coil supporting arm portion 3 is inserted in the direction in which the coil that is an obstacle is not placed. When the coil supporting arm portion 3 is inserted into the coil inner diameter 10, the lifter 1A is moved by an overhead crane so that even if the coil supporting arm portion 3 is inserted into the coil inner diameter 10, the lifter 1A is not moved. Instead, the pinion gear may be rotated to move the coil support arm portion 3 to insert the coil support arm portion 3 into the coil inner diameter 10, or the pinion gear may be moved while moving the lifter 1A. The coil supporting arm portion 3 may be inserted into the coil inner diameter 10 by rotating.

Once the coil supporting arm portion 3 is inserted into the coil inner diameter 10 of the coil 9 to be lifted, the operator can read the distance measurement value measured by the laser rangefinder 6 (for example, displayed in the cab of the overhead crane ), the position of the tip 3s of the coil supporting arm portion 3 is adjusted. That is, the distance measurement value measured by the laser rangefinder 6 is used as a guide for position adjustment of the tip 3s of the coil support arm 3, and the position of the coil support arm 3 with respect to the coil inner diameter 10 is adjusted. At the same time, by visually confirming the irradiation position of the laser beam irradiated on the coil surface, the position of the tip 3s of the coil supporting arm portion 3 can be easily adjusted.

When the distance measurement value suddenly increases while the coil supporting arm portion 3 is inserted into the coil inner diameter 10, the tip 3s of the coil supporting arm portion 3 passes through the coil inner diameter 10 and the laser rangefinder 6 measures the distance from the tip 3s of the coil supporting arm portion 3. As shown in FIG. In other words, in such a case, it is determined that the distal end 3s of the coil supporting arm portion 3 is overinserted, and the coil supporting arm relative to the coil 9 is adjusted so that the measured value of the laser rangefinder 6 corresponds to the distance to the coil surface. Adjust the position of part 3.

If the position of the tip 3s of the coil supporting arm portion 3 is adjusted to a predetermined position, that is, the tip 3s of the coil supporting arm portion 3 is positioned above the center of gravity (central position) of the coil 9 to be lifted in the width direction. When it is positioned at the back and is adjusted to a position where it does not contact the adjacent coil, the hoisting wire of the overhead crane is hoisted up, and the lifter 1A is hoisted vertically upward. By winding up the lifter 1A, the coil 9 to be lifted is gripped by the coil supporting arm portion 3 and lifted. After that, the overhead crane is moved to a new coil storage place, and the coil 9 to be lifted is lowered to the new storage place.

As described above, in the present invention, the coil supporting arm portion 3 is irradiated with the laser beam 7 always having a fixed positional relationship to measure the distance, and the measured distance is used to determine the position of the coil supporting arm portion 3. The position of the tip 3s is grasped. Accordingly, the operator can easily grasp the tip position of the coil supporting arm portion 3 by confirming the measured value by the laser rangefinder 6 .

Conventionally, an operator has made fine adjustments while following the positional relationship between the coil supporting arm portion 3 and the coil inner diameter 10 with the line of sight. It becomes possible to lift the coil 9 easily.

In the conventional method, when the tip 3s of the coil supporting arm portion 3 reaches the coil inner diameter 10 of the adjacent coil, when the coil 9 to be lifted is lifted, the tip 3s reaches the adjacent coil. There was a problem that the adjacent coils overturned due to contact. Further, if the coil supporting arm portion 3 is not sufficiently inserted into the coil inner diameter 10 of the coil 9 to be lifted, there is a risk that the coil 9 will drop when lifted. However, according to the present invention, the coil 9 can be reliably lifted vertically upward, so the above problem can be solved.

REFERENCE SIGNS LIST 1 lifter 1A lifter 2 arm support 3 coil support arm 4 mounting member 5 laser head 6 laser rangefinder 7 laser beam 8 suspension ring 9 coil 10 coil inner diameter

Claims (2)

Using a lifter equipped with a laser rangefinder that irradiates a laser beam to measure the distance and a coil support arm, the laser rangefinder measures the distance between the laser rangefinder and the coil surface, and based on the measured distance A method for lifting a coil by adjusting the position of the coil supporting arm portion with respect to the coil and inserting the coil supporting arm portion into the inner diameter of the coil to lift the coil,
The laser rangefinder irradiates the laser beam from directly above the tip of the coil-supporting arm toward the tip of the coil-supporting arm, and the optical axis of the laser beam emitted from the laser rangefinder is: Located at the tip of the coil support arm,
A method for lifting a coil, wherein the position of the coil supporting arm portion in the axial direction of the coil with respect to the inner diameter of the coil is adjusted based on a change in the distance measurement value measured by the laser rangefinder. 2. The coil lifting according to claim 1, wherein the lifter has two coil supporting arm portions, one of which is inserted into the inner diameter of the coil to lift the coil. Method.

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